// lib/main.dart
import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:media_kit/media_kit.dart';
import 'services/audio_service.dart';
import 'services/playback_service.dart';
import 'pages/home_page.dart';
import 'pages/player_page.dart';
import 'pages/playlist_page.dart'; // ✅ 导入 PlaylistPage
import 'widgets/global_mini_player.dart';

final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

void main() {
  WidgetsFlutterBinding.ensureInitialized();

  bool initSuccess = false;
  String? initError;

  try {
    MediaKit.ensureInitialized();
    PlaybackService().init();
    initSuccess = true;
  } catch (e, stack) {
    initError = '初始化失败: $e';
    print('❌ $initError');
    print(stack);
  }

  runApp(
    ChangeNotifierProvider(
      create: (_) => AudioService(),
      child: QTPlayerApp(
        initSuccess: initSuccess,
        initError: initError,
      ),
    ),
  );
}

class QTPlayerApp extends StatefulWidget {
  final bool initSuccess;
  final String? initError;

  const QTPlayerApp({
    super.key,
    required this.initSuccess,
    required this.initError,
  });

  @override
  State<QTPlayerApp> createState() => _QTPlayerAppState();
}

class _QTPlayerAppState extends State<QTPlayerApp>
    with SingleTickerProviderStateMixin {
  bool _showPlayerPage = false;
  bool _showPlaylist = false; // ✅ 新增：播放列表显示状态

  late final AnimationController _animationController;
  late final Animation<double> _slideAnimation;

  @override
  void initState() {
    super.initState();
    GlobalMiniPlayer.onOpenPlayerPage = _openPlayerPage;
    GlobalMiniPlayer.onOpenPlaylistPage = _openPlaylist;

    _animationController = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 300),
    );

    _slideAnimation = Tween<double>(begin: 1.0, end: 0.0).animate(
      CurvedAnimation(
        parent: _animationController,
        curve: Curves.easeOutCubic,
      ),
    );
  }

  @override
  void dispose() {
    _animationController.dispose();
    super.dispose();
  }

  void _openPlayerPage() {
    setState(() {
      _showPlayerPage = true;
      _showPlaylist = false; // 打开播放页时关闭播放列表
    });
    _animationController.forward(from: 0.0);
  }

  void _closePlayerPage() {
    _animationController.reverse().then((_) {
      setState(() {
        _showPlayerPage = false;
      });
    });
  }

  // ✅ 打开播放列表
  void _openPlaylist() {
    setState(() {
      _showPlaylist = true;
    });
  }

  // ✅ 关闭播放列表
  void _closePlaylist() {
    setState(() {
      _showPlaylist = false;
    });
  }

  @override
  Widget build(BuildContext context) {
    if (!widget.initSuccess) {
      return MaterialApp(
        home: Scaffold(
          backgroundColor: const Color(0xFF0E1211),
          body: Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Icon(Icons.error_outline, size: 64, color: Colors.red[300]),
                const SizedBox(height: 16),
                const Text(
                  '应用初始化失败',
                  style: TextStyle(color: Colors.white, fontSize: 20),
                ),
                const SizedBox(height: 8),
                Text(
                  widget.initError ?? '未知错误',
                  style: TextStyle(color: Colors.grey[400], fontSize: 14),
                  textAlign: TextAlign.center,
                ),
                const SizedBox(height: 24),
                ElevatedButton(
                  onPressed: () {
                    runApp(
                      ChangeNotifierProvider(
                        create: (_) => AudioService(),
                        child: QTPlayerApp(
                          initSuccess: true,
                          initError: null,
                        ),
                      ),
                    );
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: const Color(0xFFB8D4D0),
                    foregroundColor: Colors.black87,
                  ),
                  child: const Text('重试'),
                ),
              ],
            ),
          ),
        ),
      );
    }

    return MaterialApp(
      title: '清听',
      navigatorKey: navigatorKey,
      theme: ThemeData(
        brightness: Brightness.dark,
        primaryColor: const Color(0xFF7C9A9E),
        colorScheme: const ColorScheme.dark(
          primary: Color(0xFF7C9A9E),
          secondary: Color(0xFFB8D4D0),
          surface: Color(0xFF1A1F1E),
          onSurface: Colors.white,
        ),
        useMaterial3: true,
      ),
      home: const HomePage(),
      builder: (context, child) {
        return Overlay(
          initialEntries: [
            OverlayEntry(
              builder: (context) => Stack(
                children: [
                  // ① 主页面
                  Positioned.fill(child: child!),

                  // ② MiniPlayer
                  const Positioned(
                    left: 0,
                    right: 0,
                    bottom: 0,
                    child: GlobalMiniPlayer(),
                  ),

                  // ③ 播放页（全屏覆盖）
                  if (_showPlayerPage)
                    Positioned.fill(
                      child: AnimatedBuilder(
                        animation: _animationController,
                        builder: (context, child) {
                          final progress = _slideAnimation.value;
                          final offsetY =
                              MediaQuery.of(context).size.height * progress;
                          return Transform.translate(
                            offset: Offset(0, offsetY),
                            child: Opacity(
                              opacity: 1.0 - progress * 0.3,
                              child: child,
                            ),
                          );
                        },
                        child: PlayerPage(
                          onClose: _closePlayerPage,
                          onOpenPlaylist: _openPlaylist, // ✅ 传入回调
                        ),
                      ),
                    ),

                  // ④ ✅ 播放列表（最高层级，在播放页之上）
                  if (_showPlaylist)
                    Positioned.fill(
                      child: PlaylistPage(
                        onClose: _closePlaylist,
                      ),
                    ),
                ],
              ),
            ),
          ],
        );
      },
    );
  }
}